Diaphragm-horn.



D. A. MCCGNNELL. DIAPHRAGM HORN. APPLICATION man APR. 2, 1913.

l 9 l 60,902, Paente Nom', i915.

2 SHEETS-SHEET i.

I A W f/Z@ D. A; MCCONNELI.

DIAPHRAGM HORN. APPLICATION FILED APILZ. I9I3.

Patented Nov. 16, 1915.`

2 SHEETS-SHEET 2.

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w/mtssfs v wenas f URNEY Uhl-T@ STATES PATENT DUNCAN A. ld-'JCONNELL QFLELNGTDN, NEVI JERSEY, ASSIGNGR, BY NESNE ASSIGN- MENTS, TOLGTELL-MCSQNNELL MANUFACTURNG COIANY, A CORPORATION 0F DELAXV'HEApplication filed April. 2, 15H3.

To f//Z whom if may; coguwrn.'

lle it known that "L DUNCAN lioCoN- Ni-iiirr n eitixen ot' the llnitedStates, and resident of .'Xilingtoli. in the county of Hudson and Stateot ew Ilereey` have invented certain new and useful improvements inDiaphragm-llorns, ot u'hieh the following is a Specification.

Tl invention relatcg to mechanical or diaphragm horns and more pai"icularlp7 to that type in 'olii-en the diaphragml ,is Zfr iven a partlyforced and parti;K ire-e. `oibratimi at high speed o); a rotor drivenfrom a suitable motor.

Pity invention involves certain improvements in the co: :iruction of diemotor and the mountingr oi it. in proper relationship Vtothe'diaphragzn. and the main objects are to Simplify the consti-rietion1reduce the number or' parte, render the parte more accessible and moreeasy to assemble, adjust end inspect. and to reduce the cost ol mamita@ture to a minimum without reducing the eiliciency of the device.

in important feature of my improved construction involves the utilizing'of the rear.diaphragin-oasing member as a part of the motor Atraine andas one support for the arn'iaiinre Shaft, so that the remainder of nemotor 'frame ma?1 be eimplilied to a. single U-shaped casting securedthereto.

A further important Jeature involves the supporting' of the end of themotor toward the diaphragm b v an annuler well also serving' as a.diaphragm clamp.

@ther in'uLiortent features will be more particnlartipointed outhereinafter and the n wel entilree. defined in the claims.

Reference to he had to the aeeon'ipan'vf ing' dran'i in which Similarreference charac-tere ndicate ci'irreeponding parte throughout theseveral views.

Figure l a central longitudinal section or horn embodying im'invent-ion, said section being taken on the line 1-1 of Fig. 4f, part otthe resonator being broken away; Q is an inverted plan View, the motorcasing and support beine shown in section and the diaphragm andresonator being removed; and Figs. 3 and e are sections on the line 3-3and i 'i respecnively, of F l.

have i if invention enibodi n diaphragm l() and resonator or erogect Thediepnrefrin Speccatior. ci Letters Patent.

its center or in the vicinity thereof is provided 'with a suitableWear-piece i9 adapted to be engaged b v the rotor to gire the diephraginthe desired ribraiions. The oon struction and mounting the diaphragmdoes not involve anyv portion of inf. innen tion and may be Yaried orchanged without in any Way departing from, the spirit of my invention.Preferably these parts are similer in construction and operation to theCorresponding parts in the commercial llaxon horn, or as disclosed inthe patent of Miller llcese l-lntchison` Number @0l-3570i, issuedNovember 5th, i912.

.is previously stated my inrention relates particularly to thecontruction of the motor and the means lor mounting and supporting thesaine ln the preterm-d en'ilamlinientillustrated l locate this motorwithin tho rearward projection oi the diaphragm or cese, and thearmature shaft 2O ot the mot-or is substantially perpemlicular to thediaphr;V gm but eccentric in respect thereto. The armature shaft carrieea rotor 3l in the form of efface cam or ratchet haring projections.corrugations, irregnlnritie or tefl Y to si'icces i\'ely engage with theWear-piece 19 or other thrust member. The eecentricity of the armatureShaft is sulistantialljr equal. to the effective radine of the rotor,although it is 'vident that any other suitable and Well known means maybe employed for transmitting; motion from the operating face of therotor to the center of the diaphragm. he particular arrangement. ot'rotor and wear piece illustrated constitntee no portion of my invention,and therefore any other Snitz-.ble means may be employed in place ofthat shown. for securing the vibration of dia- ,liragm upon the rotor ofthe armature shaft.

@ne of the arineipal objiec'ts of my invenf tion is to simplify thcconstruction by reducing the number ol parts and the weight ot saidparts to a minimum. and one way in which .l secure this object is byutilizing the rear diaphragm casing section as a part ot the motorframe. lre'lerably the rcar diaphragm casing section l5 is in the formot a dishcd disk and includes a transyerse wall 22 spaced .trom the.diaphragm and substantially parallel thereto and connected to theclamping portion 1i by an annular peripheral wall including acylii'ulrical portion and an inc lined or conical portion The transversewall is spaced Vliroin thc diaphragm a suilicient distance to permit thepositioning ot the rotor and wear-piece therebetween and permit theproper vibration of the diaphragm. rl`his casing section has thetransverse wall E22 provided with an opening through which thc wires orother conductors may freely extend. rl`his transverse wall 22 serves asa bearing tor one end ot the armature shaiit 2l) and for supporting theopposite end I provide a sul'istantially U-shaped frame member havingsideI legs or bars 2li and 27 extending rearwardly from the wall 22 anda transverse portion 2S substantially parallel to the wall 22 but spacedtherefrom and formed integral with the side hars Q6 and Q7. The armatureshaft at the end away from the liaphragm is supported in the transverse,portion 2S of this U-shaped member. as will be described more in detailhereinafter. Thus, it will be noti-d that the U-shaped bar supports oneend o'l thc armature shaft and the rear diaphragm casing section '15supports the opposite end and that the two together make up the motorframe, while the saine men'iber which tol-ins one end wall ot' the trameand supports one end otl the arn'iature shaft also serves as thediaphragm clamping' member. The two parts may be secured together in anysuitable manner as ior instanceI by screws 29 extending through the wallinto the ends of the side bars 2G and E27. The two side bars 2G and 27serve to support the pole pieces ol the motor and in Jfact may haveinwardly projecting portions 30 integral therewith and constituting saidpole pieces. The field made up sepa ately and after being provided withsuitable casings to hold the separate wires ol the coil together may beslipped on over the pole-pieces prior to the placing,r of the armaturetherebetween. Thus, the motor may be very easily assembled by firstslipping the coils over the pole-pieces, then inserting the arn'iaturethereon, and then securing the U-shaped frame member to the wall 22 bymeans ot the screws 29. For holding the coils in position upon thepolepieces and preventing their slipping inwardly or becomingaccidentally displaced coils 81 are preferablyv so as to Contact withthe armature. l provide suitable spring clips 42 which may extend acrossirom one coil to the other and may beheld l'roni inward movemcnt byengaging wilh the pole-pieces.

The transverse portion H oli' the motor trame mcmbcr is provided orprojections 332i. il and 353 on thc outer sln'iacc and thcsc thrccprojections have alined openings substantmlly parallel to said portion2S. lYithin the openings oll the two cnd projections i321 and 35 arc thebrushcs -l which are adjustable and are held in place in any 'suitablemanner. 'l`wo insulated wires 37 lead from the two coils to the outcrends oi' the two brushes and two insulated wires S lead troni the coilsthrough the opening' 25 to teri'ninals on the inclined or conical wall2l. 'l`he terminals l may be ot any suitable character. I have shownbolts extending through insulated bushings and having lock nuts at theouter end tor with three lugs retaining the wires. rlhe centralprojection 'i-l not only has an opening transversely thereotI throughwhich the brushes may extend. but also has an opening axially ot' themotol and serves to receive one end ot the arniatureshatt and theconnnutator 30 with which the brushes engage. 'lhe end oi' the armatureshatt preferably iits within a. socket in a plug al() screwed into theouter end ot the projection 54. and by adjusting this plug the armaturemay be moved endwise. a limited distance to insure the proper contactot' the rotor with the w rar-piece and thus absolute accuracy in theJforming or assembling of the p'arts is not required and wear may betaken up. The plug` may be held in place,v by a lock nut- 41 andpreferably has an annular external groove communicating with an oil ductin the projection 534, as shown in Fig. i and com1uuni eating with thesocket for the armature shaft through a small opening as indicated inl`ig. 1. For lubricatingr the armature shaft at its opposite end I mayprovide a small duct 43, leading downwardly from the cylindrical wall 23to the bearing of the armature shaft and upon the side toward thediaphragm, so as not to intel-tere with the armature or coils. Forprotecting the motor. l provide a thin casing 44 preferably ot' metaland preferably ot. cylindrical form. The casing is shown as being of cupshape with the open end slipping on to the cylindrical wall 25E and thenheld in place by suitable screws 45. The .length ot' this cylindricalwall determines the endwise sliding movement ot the casing and thecasing is preferably considerably smaller than the '(liapliragin, sothat the inclined Wall serves not only to limit the position of thecasing 44, but connects the casing of small diameter to the diaphragmclamps of larger diameter.

